Subaru FORESTER 2001 Service Manual page 270

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
6 CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from tumble gen-
erator valve position sensor.
3) Turn ignition switch to ON.
4) Measure voltage between tumble generator
valve position sensor connector and engine
ground.
Connector & terminal
(E54) No. 1 (+) — Engine ground (−):
7 CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn ignition switch to OFF.
2) Measure resistance of harness between
ECM connector and tumble generator valve
position sensor connector.
Connector & terminal
(B135) No. 23 — (E54) No. 3:
8 CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
Measure resistance of harness between
tumble generator valve position sensor con-
nector and engine ground.
Connector & terminal
(E54) No. 3 — Engine ground:
9 CHECK POOR CONTACT.
Check poor contact in tumble generator valve
position sensor connector.
Step
Is the voltage more than
4.5 V?
Is the resistance less than
1 Ω?
Is the resistance less than
10 Ω?
Is there poor contact in
tumble generator valve
position sensor connector?
EN(DOHC TURBO)-269
Check Yes
Go to step 7.
Go to step 8.
Repair ground
short circuit in
harness between
tumble generator
valve position
sensor and ECM
connector.
Repair poor con-
tact in tumble
generator valve
position sensor
connector.
Engine (Diagnostics)
No
Repair harness
and connector.
NOTE:
In this case,
repair the follow-
ing:
¼ Open circuit in
harness between
tumble generator
valve position
sensor and ECM
connector
¼ Poor contact in
throttle position
sensor connector
¼ Poor contact in
ECM connector
¼ Poor contact in
coupling connec-
tor
¼ Poor contact in
joint connector
Repair harness
and connector.
NOTE:
In this case,
repair the follow-
ing:
¼ Open circuit in
harness between
tumble generator
valve position
sensor and ECM
connector
¼ Poor contact in
ECM connector
¼ Poor contact in
tumble generator
valve position
sensor connector
¼ Poor contact in
coupling connec-
tor
Go to step 9.
Replace tumble
generator valve
assembly. <Ref.
to FU(DOHC
TURBO)-40,
Tumble Generator
Valve Assembly.>